Ответ:
a) $$16x^2 - 2x - (16x^2 + 8x + 1) = 16x^2 - 2x - 16x^2 - 8x - 1 = -10x - 1$$
б) $$4(9y^2 - 6y + 1) - 36y^2 + 18y = 36y^2 - 24y + 4 - 36y^2 + 18y = -6y + 4$$
a) $$16x^2 - 2x - (16x^2 + 8x + 1) = 16x^2 - 2x - 16x^2 - 8x - 1 = -10x - 1$$
б) $$4(9y^2 - 6y + 1) - 36y^2 + 18y = 36y^2 - 24y + 4 - 36y^2 + 18y = -6y + 4$$